Telescopic Build Tank Structure for Powder Containment and Access
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Solution Overview
Problem
Existing build tanks for additive manufacturing are prone to powder leakage, expensive, and sensitive to temperature and dimension variations, with conventional vacuum seals being unreliable and costly to maintain.
Innovation Solution
A telescopic build tank design with overlapping segments and releasable attachments, eliminating the need for conventional vacuum seals and allowing easier access to the build table, reducing powder leakage risks and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional vacuum seals are used to prevent powder leakage, then sealing function is achieved, but device complexity and production cost increase
Solution Approach 1:
The patent removes the vacuum seal component entirely from the system. Instead of using conventional vacuum seals between the build table and build tank, the invention relies on the inherent geometry of the telescopic build tank design where the build table is contained within the build tank structure, eliminating the need for separate sealing mechanisms while maintaining powder containment reliability
Solution Approach 2:
The build tank is divided into multiple telescopic segments that can extend and retract. This segmentation allows the build tank to adapt its size while maintaining structural integrity and powder containment without requiring complex vacuum seals at each interface, reducing overall device complexity
2Reliability
If ceramic rope seals are used to seal the build table periphery, then powder leakage is prevented, but manufacturing cost and production complexity increase
Solution Approach 1:
The patent eliminates the ceramic rope seal from the system by redesigning the build tank structure. The telescopic segments and build table arrangement create a geometry that inherently prevents powder leakage without requiring additional sealing materials, significantly reducing manufacturing cost and production complexity
Solution Approach 2:
Instead of adding seals to prevent powder leakage, the invention inverts the approach by designing the structure so that powder leakage is prevented by the basic geometric arrangement of telescopic segments and build table, making the system simpler and cheaper to manufacture
3Reliability
If sealed build table arrangement is used to prevent powder leakage, then powder containment is improved, but access to build table bottom becomes difficult
Solution Approach 1:
The build tank is designed with telescopic segments that can dynamically extend and retract. During operation, the build tank extends to contain powder while providing access to the build table bottom. This dynamic adjustment allows the system to maintain both powder containment and operational accessibility without compromising either function
Solution Approach 2:
The telescopic segmentation of the build tank allows different portions to be positioned independently, enabling operators to access the build table bottom for loading and leveling while the upper segments maintain powder containment, resolving the contradiction between sealing and accessibility
4Ease of operation
If telescopic build tank design is used to improve accessibility, then ease of operation increases, but device complexity increases
Solution Approach 1:
The telescopic build tank uses simple extension and retraction mechanisms that provide dynamic adaptability for accessibility while maintaining relatively simple construction. The segments connect through straightforward mechanical interfaces that extend the tank's reach without requiring complex actuation systems, balancing operational ease with structural simplicity
Data Source
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AI summary
The invention relates to a build chamber (1) for an additive manufacturing apparatus (100) for forming a three-dimensional article layer by layer from a powder. The build chamber (1) comprising a build chamber base body (2) and the build chamber base body (2) is formed by at least two segments (4) telescopically coupled together. Associated with the telescopically coupled segments are one or more bellows assemblies, further coupled to support structure configured to raise and/or lower the build table. An associated method is also provided.